Mast Cell Tumors

Cutaneous mast cell tumors (MCT) are a common form of neoplasia(cancer) in the dog.

Mast cells are normal immune system cells. The intracellular cytoplasmic granules contain heparin, histamine, platelet-activating factor, and eosinophilic chemotactic factor. The visual appearance of cutaneous MCT is variable; they can look like almost any lesion.